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| author | Rabin Vincent <rabin.vincent@axis.com> | 2015-08-19 15:41:35 +0200 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2015-08-27 14:50:55 +0200 |
| commit | bb08a7d489bd22a9b6e489f8c8449b0bc92594d0 (patch) | |
| tree | 6c2af778c7119fa85251d2fce24dcdda1504a319 /drivers/mmc | |
| parent | 767264725d6c0c8e2a42f14ded88c8f05fec5863 (diff) | |
| download | linux-bb08a7d489bd22a9b6e489f8c8449b0bc92594d0.tar.gz linux-bb08a7d489bd22a9b6e489f8c8449b0bc92594d0.tar.bz2 linux-bb08a7d489bd22a9b6e489f8c8449b0bc92594d0.zip | |
mmc: usdhi6rol0: fix NULL pointer deref in debug print
host->sg is only set when we're transferring multiple blocks. Check for
its availibility before dereferencing it in the timeout work debug
print.
Signed-off-by: Rabin Vincent <rabin.vincent@axis.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/usdhi6rol0.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/mmc/host/usdhi6rol0.c b/drivers/mmc/host/usdhi6rol0.c index 63d5d722b01f..4188e84ea450 100644 --- a/drivers/mmc/host/usdhi6rol0.c +++ b/drivers/mmc/host/usdhi6rol0.c @@ -1634,6 +1634,7 @@ static void usdhi6_timeout_work(struct work_struct *work) struct usdhi6_host *host = container_of(d, struct usdhi6_host, timeout_work); struct mmc_request *mrq = host->mrq; struct mmc_data *data = mrq ? mrq->data : NULL; + struct scatterlist *sg = host->sg ?: data->sg; dev_warn(mmc_dev(host->mmc), "%s timeout wait %u CMD%d: IRQ 0x%08x:0x%08x, last IRQ 0x%08x\n", @@ -1669,7 +1670,7 @@ static void usdhi6_timeout_work(struct work_struct *work) "%c: page #%u @ +0x%zx %ux%u in SG%u. Current SG %u bytes @ %u\n", data->flags & MMC_DATA_READ ? 'R' : 'W', host->page_idx, host->offset, data->blocks, data->blksz, data->sg_len, - sg_dma_len(host->sg), host->sg->offset); + sg_dma_len(sg), sg->offset); usdhi6_sg_unmap(host, true); /* * If USDHI6_WAIT_FOR_DATA_END times out, we have already unmapped |